CN111855475A - Method for detecting water absorption capacity of titanium dioxide - Google Patents
Method for detecting water absorption capacity of titanium dioxide Download PDFInfo
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- CN111855475A CN111855475A CN202010836147.XA CN202010836147A CN111855475A CN 111855475 A CN111855475 A CN 111855475A CN 202010836147 A CN202010836147 A CN 202010836147A CN 111855475 A CN111855475 A CN 111855475A
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N5/00—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid
- G01N5/02—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid by absorbing or adsorbing components of a material and determining change of weight of the adsorbent, e.g. determining moisture content
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Abstract
The invention belongs to the technical field of titanium dioxide, and particularly relates to a method for detecting water absorption capacity of titanium dioxide, which comprises the following steps: removing water in the titanium dioxide to be detected, adding the titanium dioxide to be detected into a container, and weighing the total mass of the titanium dioxide to be detected and the container to be m; adding excessive water into the container, centrifugally separating excessive water, and weighing the total mass of the container and the rest materials, wherein the mass is counted as M; and calculating the water absorption Y of the titanium dioxide as M-M. The method for detecting the water absorption capacity of the titanium dioxide can realize the detection of the water absorption capacity of the titanium dioxide, is convenient to operate, has high detection efficiency and high accuracy, and is beneficial to popularization.
Description
Technical Field
The invention relates to the technical field of titanium dioxide, in particular to a method for detecting water absorption capacity of titanium dioxide.
Background
The coating belongs to the largest application field of titanium dioxide. With the increasingly strict environmental protection requirements and the increasing demand of healthy life, the paint products are more and more developed to be water-based, and the titanium dioxide is also required to be suitable for a water-based paint system; the water absorption capacity of the titanium dioxide directly influences the application performance of the water-absorbing coating. The lower the water absorption of the titanium dioxide, the better its pigment and application properties. Meanwhile, the water absorption capacity of the titanium dioxide also influences the water dispersibility of the titanium dioxide, and when the titanium dioxide absorbs more water, the titanium dioxide is combined with hydroxyl on the surface to weaken the electronegativity of the surface, so that the high dispersibility of the two phases is weakened, and the dispersion stability is also reduced. The water absorption of titanium dioxide is affected by the type and amount of salt treatment additives, the calcining temperature and time, and the coating treatment. However, at present, only the detection method and standard of oil absorption are available in national standards and company enterprises, and the water absorption detection of titanium dioxide has no relevant standard.
CN 110274843A discloses a method for detecting water absorption capacity of titanium dioxide, which comprises the following steps: a. removing water in the titanium dioxide to be detected; b. b, cooling the titanium dioxide to be detected, of which the moisture is removed in the step a, to room temperature; c. taking a titanium dioxide sample M1g, and placing the obtained titanium dioxide sample on an operation board; d. dropwise adding pure water into the titanium dioxide sample until the titanium dioxide sample is fully wetted; e. and d, measuring the pure water amount M2g used at the end point of the full wetting of the titanium dioxide sample in the step d, and converting the pure water amount into the water absorption capacity of the titanium dioxide through a formula M1/M2 multiplied by 100 g.
CN 111426592A discloses a method for detecting water absorption capacity of titanium dioxide, which comprises the following steps: removing water in the titanium dioxide to be measured, cooling to room temperature, taking a proper amount of titanium dioxide samples, putting the titanium dioxide samples into a beaker, dropwise adding pure water into the beaker, stirring in the same direction until the titanium dioxide samples are fully wetted, and measuring the pure water used at the fully wetted end point.
The detection method in the above patent is complicated in operation, and the end point of sufficient wetting of the sample is not well determined, which is liable to cause an error.
Disclosure of Invention
The invention aims to provide the method for detecting the water absorption capacity of the titanium dioxide, which is convenient to operate and high in accuracy.
A method for detecting water absorption capacity of titanium dioxide comprises the following steps:
s1, removing water in the titanium dioxide to be detected, adding the titanium dioxide to be detected into a container, and weighing the total mass of the titanium dioxide to be detected and the container to be m;
s2, adding excessive water into the container, then centrifugally separating the excessive water, and weighing the total mass of the container and the rest materials, wherein the mass is counted as M;
and S3, calculating the water absorption Y of the titanium dioxide powder as M-M.
In the method for detecting the water absorption capacity of the titanium dioxide, in step S2, the rotation speed of the centrifugation is 6000-10000 rpm.
In the step S2, the centrifugal rotation speed is 8000-9000 revolutions per minute.
In the method for detecting the water absorption capacity of the titanium dioxide, in step S2, the rotation speed of the centrifuge is 8000 revolutions per minute.
In the method for detecting the water absorption capacity of the titanium dioxide, in step S2, the centrifugation time is 15-20 min.
Compared with the prior art, the invention has the beneficial effects that:
the method for detecting the water absorption capacity of the titanium dioxide can realize the detection of the water absorption capacity of the titanium dioxide, is convenient to operate, has high detection efficiency and high accuracy, and is beneficial to popularization.
Detailed Description
Specifically, the method for detecting the water absorption capacity of the titanium dioxide comprises the following steps:
s1, removing water in the titanium dioxide to be detected, adding the titanium dioxide to be detected into a container, and weighing the total mass of the titanium dioxide to be detected and the container to be m;
s2, adding excessive water into the container, then centrifugally separating the excessive water, and weighing the total mass of the container and the rest materials, wherein the mass is counted as M;
and S3, calculating the water absorption Y of the titanium dioxide powder as M-M.
The inventor of the invention finds that the titanium dioxide full of water can be separated from excessive water only when the centrifugal rotating speed is 6000-10000 r/min and the centrifugal time is 15-20 min through a large number of experiments. If the centrifugal rotating speed is too large and the time is too long, the water absorbed in the titanium dioxide is separated; if the rotational speed of the centrifugation is too low and the time is too short, the excess water in the container cannot be completely separated. Preferably, the rotating speed of the centrifugation is 8000-; most preferably, the rotation speed of the centrifuge is 8000 rpm.
The operability and the data reproducibility of the centrifugal method for measuring the water absorption capacity of the titanium dioxide are strong, the instrument operation does not need manual judgment of the terminal point, the deviation caused by human errors and unskilled operation can be eliminated, the operation is simple and convenient, a plurality of samples can be detected simultaneously, the detection efficiency is greatly improved, and great convenience is brought to the detection of the water absorption capacity of the titanium dioxide.
In order to ensure the accuracy of the water absorption detection of the titanium dioxide, each batch of titanium dioxide needs to be sampled at least 5 times, and the average value of each detection data is obtained as the water absorption of the titanium dioxide.
The water in the titanium dioxide to be detected is removed in order to ensure and improve the accuracy of water absorption detection of the titanium dioxide, and the water can be removed in an oven at the temperature of less than 120 ℃.
The scheme of the invention will be explained with reference to the examples. It will be appreciated by those skilled in the art that the following examples are illustrative of the invention only and should not be taken as limiting the scope of the invention. The examples, where specific techniques or conditions are not indicated, are to be construed according to the techniques or conditions described in the literature in the art or according to the product specifications. The raw materials are not indicated by manufacturers, and are all conventional products which can be obtained commercially.
Example 1
Taking 3 dry 100ml centrifuge tubes, numbering the centrifuge tubes according to 1, 2 and 3, weighing 5.00g of dried titanium dioxide, adding the dried titanium dioxide into the centrifuge tubes, weighing the total mass of the dried titanium dioxide, respectively, taking M1-15.67 g, M2-15.77 g and M3-15.69 g, adding excessive water into each centrifuge tube, adding water, directly centrifuging, putting the centrifuge tubes into a centrifuge, centrifuging at 8000 rpm for 15min, taking out the centrifuge tubes after the centrifugation, pouring off the water after the centrifugation, wiping water beads in the walls of the centrifuge tubes clean, weighing the mass of each centrifuge tube and the mass of the materials respectively as M1-60.87 g, M2-61.09 g and M3-60.97 g, calculating the water absorption capacity of the samples respectively as Y1-45.20 g, Y2-45.32 g and Y3-45.28 g, and taking the average water absorption capacity of the samples respectively as the final water absorption capacity of the three samples 45.27 g.
Example 2
Taking 3 dry 100ml centrifuge tubes, numbering the centrifuge tubes according to 1, 2 and 3, weighing 10.00g of dried titanium dioxide, adding the dried titanium dioxide into the centrifuge tubes, weighing the dried titanium dioxide into the centrifuge tubes respectively, weighing the dried titanium dioxide into M1-20.60 g, weighing the centrifuge tubes into the centrifuge tubes respectively, centrifuging the centrifuge tubes for 15min at 8000 rpm, taking out the centrifuge tubes, pouring off the centrifuged water, wiping off water beads in the walls of the centrifuge tubes, weighing the centrifuge tubes and the materials respectively into M1-66.16 g, M2-66.08 g and M6854-66.20 g, calculating the water absorption of the samples respectively into Y1-45.56 g, Y2-45.50 g and Y3 g, and taking the average value of 45.56g of the water absorption of the samples respectively.
Example 3
Taking 3 dry 100ml centrifuge tubes, numbering the tubes according to 1, 2 and 3, weighing 10.00g of dried titanium dioxide, adding the weighed titanium dioxide into the centrifuge tubes, weighing the dried titanium dioxide into the centrifuge tubes respectively, adding excessive water into each centrifuge tube, adding water into the centrifuge tubes, directly centrifuging the centrifuge tubes, putting the centrifuge tubes into a centrifuge, centrifuging the centrifuge tubes at 8000 rpm for 20min, taking out the centrifuge tubes after the centrifugation is finished, pouring off the centrifuged water, wiping water beads in the walls of the centrifuge tubes clean, weighing the centrifuge tubes and the materials respectively as M1 66.19g, M2 as 66.22g and M3 as 66.25g, calculating the water absorption capacity of the samples respectively as Y1 as 45.59g, Y2 as 45.64g and Y45.61 g, and taking the average value of the water absorption capacity of the samples as a final 45.61 g.
Claims (5)
1. The method for detecting the water absorption capacity of the titanium dioxide is characterized by comprising the following steps of:
s1, removing water in the titanium dioxide to be detected, adding the titanium dioxide to be detected into a container, and weighing the total mass of the titanium dioxide to be detected and the container to be m;
s2, adding excessive water into the container, then centrifugally separating the excessive water, and weighing the total mass of the container and the rest materials, wherein the mass is counted as M;
and S3, calculating the water absorption Y of the titanium dioxide powder as M-M.
2. The method for detecting the water absorption capacity of titanium dioxide as recited in claim 1, wherein in step S2, the rotation speed of the centrifugation is 6000-10000 rpm.
3. The method for detecting water absorption of titanium dioxide as recited in claim 2, wherein in step S2, the rotation speed of the centrifugation is 8000-9000 rpm.
4. The method for detecting the water absorption capacity of titanium dioxide according to claim 3, wherein in step S2, the rotation speed of the centrifuge is 8000 rpm.
5. The method for detecting the water absorption capacity of titanium dioxide according to any one of claims 1 to 4, wherein in step S2, the centrifugation time is 15-20 min.
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| CN202010836147.XA CN111855475A (en) | 2020-08-19 | 2020-08-19 | Method for detecting water absorption capacity of titanium dioxide |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111426592A (en) * | 2020-04-08 | 2020-07-17 | 攀钢集团重庆钒钛科技有限公司 | Method for detecting water absorption capacity of titanium dioxide |
| CN113358515A (en) * | 2021-05-26 | 2021-09-07 | 攀钢集团攀枝花钢铁研究院有限公司 | Oil absorption detection method and system |
| CN114018749A (en) * | 2021-11-24 | 2022-02-08 | 山东嘉华生物科技股份有限公司 | Detection method for water retention rate of wiredrawing protein |
| CN114279885A (en) * | 2021-12-22 | 2022-04-05 | 佛山金戈新材料股份有限公司 | Method for detecting oil absorption value of micron-sized inorganic powder |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111426592A (en) * | 2020-04-08 | 2020-07-17 | 攀钢集团重庆钒钛科技有限公司 | Method for detecting water absorption capacity of titanium dioxide |
| CN113358515A (en) * | 2021-05-26 | 2021-09-07 | 攀钢集团攀枝花钢铁研究院有限公司 | Oil absorption detection method and system |
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| CN114018749A (en) * | 2021-11-24 | 2022-02-08 | 山东嘉华生物科技股份有限公司 | Detection method for water retention rate of wiredrawing protein |
| CN114279885A (en) * | 2021-12-22 | 2022-04-05 | 佛山金戈新材料股份有限公司 | Method for detecting oil absorption value of micron-sized inorganic powder |
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Application publication date: 20201030 |